Three-dimensional finite element analysis of stress distribution in composite resin cores with fiber posts of varying diameters |
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Authors: | Okamoto Kazuhiko Ino Teruno Iwase Naoki Shimizu Eitaroh Suzuki Megumi Satoh Goh Ohkawa Shuji Fujisawa Masanori |
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Affiliation: | Division of Prosthodontics, Department of Restorative and Biomaterials Sciences, Meikai University School of Dentistry, 1-1 Keyakidai, Sakado, Saitama 350-0283, Japan. okamoto@dent.meikai.ac.jp |
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Abstract: | Using three-dimensional finite element analysis (3D-FEA), stress distributions in the remaining radicular tooth structure were investigated under the condition of varying diameters of fiber post for fiber post-reinforced composite resin cores (fiber post and core) in maxillary central incisors. Four 3D-FEA models were constructed: (1) fiber post (?1.2, ?1.4, and ?1.6 mm) and composite resin core; and (2) gold-cast post and core. Maximum stresses in the tooth structure for fiber post and core were higher than that for gold-cast post and core. In the former models, stresses in the tooth structure as well as in the composite resin were slightly reduced with increase in fiber post diameter. These results thus suggested that to reduce stress in the remaining radicular tooth with a large coronal defect, it is recommended to accompany a composite resin core with a fiber post of a large diameter. |
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